Substance Drug Test Kit: Panels, Cutoffs and How to Choose

Quick answer: A substance drug test kit is a CLIA-waived, FDA-cleared screening device that detects drugs or metabolites in urine or oral fluid. Urine kits use cutoffs such as THC 50 ng/mL and cocaine 150 ng/mL, with typical windows of 1-4 days for occasional use. Positives are preliminary; confirm by GC/MS or LC-MS/MS. American Screening Corp supplies clinics, courts, and employers.

• What it detects: drug metabolites at fixed cutoffs, commonly in 5- to 18-panel configurations.
• Who it is for: clinics, treatment centers, probation and courts, employers, staffing firms, labs and distributors.
• What a result means: every non-negative screen is preliminary and needs laboratory confirmation.

What is a substance drug test kit?

A substance drug test kit is an immunoassay screening device. It uses antibodies to react with a drug or its metabolite when the concentration is at or above a set cutoff, expressed in nanograms per milliliter (ng/mL).

Kits come as urine cups, dip cards, and oral fluid (saliva) devices. Each gives a result in about 5 minutes. A kit screens only; it does not identify the exact amount of a drug.

What do standard cutoff levels look like?

The HHS Mandatory Guidelines for Federal Workplace Drug Testing Programs, published by SAMHSA, set the initial urine test cutoffs that most programs use as a reference (SAMHSA, Workplace Drug Testing resources). Common screening cutoffs are below. Always confirm the cutoff printed on the product you buy, since some kits use different values.

*Windows vary with dose, frequency, metabolism and hydration. Treat them as general ranges, not guarantees.

Which format should you buy: cup, dip card or oral fluid?

Choose by who is collecting, where, and how much oversight you need.

Urine cups

An integrated cup holds the specimen and the test in one unit, which reduces handling. Cups often include temperature strips and adulterant checks. They suit clinics, probation offices and treatment programs. See our drug test cups.

Dip cards

Dip cards are placed into a collected specimen. They cost less per test and suit high-volume programs that already have a collection container. See our drug test dip cards.

Oral fluid tests

Oral fluid collection is easy to observe and is useful for recent use, typically within about 1-2 days. It is a common choice for post-incident and roadside-style situations where a restroom is not practical.

How do you read the result?

1. Check the specimen temperature window on the cup within 4 minutes of collection.
2. Wait the time stated in the product instructions, usually about 5 minutes.
3. Read each drug line: a line in the test region means negative for that drug; no line means non-negative at or above the cutoff.
4. A line in the control region must appear, or the test is invalid and must be repeated with a new device.
5. Record the result, lot number and expiration date, then send non-negative specimens for confirmation.

A non-negative result is preliminary. Confirm by GC/MS or LC-MS/MS laboratory testing before any decision is made. Immunoassay screens can cross-react with some legal medications, so a medical review is part of a sound process.

Is the kit FDA-cleared and CLIA-waived?

FDA reviews drugs of abuse tests, and many point-of-care urine devices carry FDA clearance and CLIA-waived status (FDA, Drugs of Abuse Tests). Verify the clearance and waiver listed for each specific product and panel before you buy. If your program falls under DOT rules, federal regulated testing follows 49 CFR Part 40, which requires specific collection procedures and laboratories; a point-of-care screening kit does not replace that process.

Buyer checklist

• Confirm the panel matches your policy (5, 10, 12 or more drugs).
• Check printed cutoffs in ng/mL on every drug line.
• Verify FDA-cleared and CLIA-waived status on the product page.
• Choose validity checks (temperature, adulterants) if tampering is a concern.
• Check expiration dates and lot traceability on bulk orders.
• Arrange a laboratory for confirmation testing.
• Write a testing policy that your counsel has reviewed.
• Train collectors on reading and documenting results.

What we hear from buyers

In support, the most common questions from clinics and staffing firms are about cutoffs that do not match their policy and about what to do after a non-negative screen. Check both before placing a bulk order. Employers who also screen candidates often pair drug testing with background checks from our sister division, Reveal Background. Questions about volume or private label can go through our contact page. American Screening Corp ships from Shreveport, Louisiana, nationwide, with same-day shipping on in-stock orders.

Frequently asked questions

What does a substance drug test kit detect?

It detects drugs or their metabolites at or above set cutoffs, such as THC 50 ng/mL and cocaine 150 ng/mL in urine. Panels range from 5 to 18 drugs. Results are preliminary until confirmed in a laboratory.

How long can a urine kit detect drug use?

Most drugs are detectable for about 1-4 days after occasional use. Heavy chronic marijuana use can be detected for up to 30 days. Dose, metabolism and hydration change these windows.

Are drug test kits FDA-cleared and CLIA-waived?

Many point-of-care urine and oral fluid kits are FDA-cleared and CLIA-waived. Check the clearance on each product page. DOT-regulated testing must follow 49 CFR Part 40 instead.

What should we do after a positive screen?

Treat it as preliminary. Send the specimen for confirmation by GC/MS or LC-MS/MS testing, and have a medical review consider legal prescriptions before any action.

Sources

• SAMHSA: Workplace Drug Testing and HHS Mandatory Guidelines
• eCFR: 49 CFR Part 40, Procedures for Transportation Workplace Drug and Alcohol Testing Programs
• FDA: Drugs of Abuse Tests

This article is general information, not legal or medical advice.